Craftsman 247.79452 owner manual Problem, Possible Cause, Corrective Action

Models: 247.79452

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Problem

Problem

Possible Cause

Corrective Action

Cylinder rod will not move

Cylinder shaft speed slow while extending end retracting

1.Broken drive shaft,

2.Shipping plugs left in hydraulic hoses,

3.Set screws in coupling not adjusted properly.

4, Loose shaft coupling.

5.Gear sections damaged.

6.Damaged relief valve.

7, Hydraulic lines blocked. 8, Incorrect oil level.

g.Damaged or blocked directional valve.

t.Gear sections damaged.

2.Excessive pump inlet vacuum.

3, Slow engine speed.

4.Damaged relief valve.

5.Incorrect oil level.

6.Contaminated oil,

7.Directional valve leaking internally.

8.Internally damaged cylinder,

1.Return unit to Sears service center.

2.Disconnect hydraulic hose, remove shipping plugs, and reconnect hose.

3.Refer to adjustment secfion of this manual and adjust the couplers

4.Correct engine/pump alignment.

5.Return unit to Sears service center.

6.Return unit to Sears service center.

7.Flush and clean hydraulic system,

!8. Check oil level, Refill if necessary,

9.Return unit to Sears service center

1.Return unit to Sears service center.

2.Make certain that the pump inlet hoses are clear and unblocked. Use

short, large diameter inlet hoses.

3.Return unit to Sears service center.

4.Return unitto Sears service center.

5.Check oil level. Refill if necessary.

6.Drain oil, clean reservoir, refill, make certain oil return tube is below oil lever.

7.Return unitto Sears service center.

8.Return unitto Sears service center.

Engine

runs but wood will not sprit, or

1, Small gear section damaged.

splits too slowly

 

 

2.

Pump check valve leaking.

 

 

 

 

3. Excessive vacuum in pump inlet,

 

 

 

 

4.

Incorrect oil level.

 

 

 

 

5.

Contaminated oil

 

 

 

 

6.

Directional valve leaking internally.

 

 

 

 

7.

Internally damaged cylinder.

 

 

 

 

8.

Ovedoaded cylinder.

Engine

stalls during

splitting

wood

1.

Low horsepower/weak engine.

 

 

 

 

2.

Overloaded cylinder

Engine

will not tum

or stalls

under low

1,

Engine/pump misaligned.

load

 

 

 

! 2,

Frozen or seized pump.

 

 

 

 

3,

Weak engine.

 

 

 

 

 

4.

Hydraulic lines blocked,

 

 

 

 

5.

Blocked

directional valve.

Leaking pump shaft

seal

 

1,

Broken

drive shaft.

 

 

 

 

2.

Engine/pump

misaligned.

 

 

 

 

3.

Gear sections

damaged.

 

 

 

 

4, Poorly positioned shaft seal.

 

 

 

 

5.

Oil breather plugged.

1.Return unit to Sears service center.

2.Return unit to Sears service center.

3.Make certain that the pump inlet hoses are clear and unblocked. Use short, large diameter inlet hoses.

4.Check oir level. Refill if necessary.

5.Drain oil, clean reservoir, refill, make certain oil return tube is below oil level.

6.Return unitto Sears service center.

7.Return unit to Sears service center.

8.Do not attempt to splitwood against the grain.

1.Return unit to Sears service center.

2.Do not attempt to splitwood against

the grain. If engine stalls repeatedly, contact Sears service center.

1.Correct alignment.

2.Return unit to Sears service center.

3.Return unit to Sears service center.

4.Flush and clean hydraulic system.

5.Return unit to Sears service center

1.Return unit to Sears service center.

2.Correct alignment.

3.Return unit to Sears service center.

4.Return unit to Sears service center.

5.Make certain reservoir is properly vented.

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Craftsman 247.79452 owner manual Problem, Possible Cause, Corrective Action